Excavating-machine



(No Mddel.) 2 Sheets-Sheet 1. M. E. PUGH.

EXOAVATING MACHINE.

Patented May 18, 1897.

6% INVENTUR.

' Nirnn STATES MORTON E. PUGI'I, OF CHICAGO, ILLINOIS.

EXCAVATlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 582,683, dated May 18, 1897.

A fi ti fil d June 16, 1896- erial No. 595,794. (No model.)

To all whom it may concern:

Be it known that I, MORTON E. PUGH, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Excavating-Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form part of this specification.

My invention relates to improvements in excavating or shoveling machines, and particularly to that class in which shovels or dippers are fastened to the ends of long handles operating from stationary booms by means of'engines running continuously; and it consists in the mechanism hereinafter described, and particularly pointed out in the claims.

The object of my invention is, first, to provide a traveling power-shovel and car running upon tracks,with a parallel pair of tracks adjacent thereto, so that the cars to be filled with the excavated material need not be moved as the operation of filling proceeds, but the shovel-car is itself propelled by its engine; second, to provide a pair of shovels or dippers upon the ends of handles working through stationary booms, which may be 0perated either simultaneously or alternately, and, third, to provide means for pressing the clippers into the material to be excavated and work the same along the material until filled, and then to hoist and dump them upon an endless carrier to convey the material to the cars to be filled. I accomplish these objects by means of the mechanism illustrated in the accompanying drawings, forming part of this specification, and in which Figure 1 represents an end elevation of the shovel-car and its shoveling mechanism and the cars to be loaded, and Fig. 2 is a plan View of the shoveling car platform and its machinery.

Similarletters and figures of reference refer to the same device in both views.

A A represent a pair of parallel tracks upon which the machine-car travels, and B B a pair of tracks parallel to the former upon which the stationary cars stand to be filled.

0 represents one of the stationary cars, with its usual body, frame, truck, axles, and wheels.

D is the framework, upon which is secured the platform for the machinery. It is supported on the usual trucks and wheels running on rails A A.

E E are uprights, and F G diagonal struts, for supporting the stationary booms H, of which there are two, one for each of the dippers. The shovels I J are pivotally secured to the ends of two long handles K L, respectively, which pass through framed openings M N on said booms. Dipper I has secured to a bail O at its forward end a cable P, at its rear end a cable Q, and the handle K has secured near its upper end at R a cable S. In a similar manner dipper J has at its forward end a bail T, to which is attached a cable U, and to its rear end a cable V, and the dipper-handleL has attached near its upper end a cable W. Cable P is used for pulling the dipper I along the bank or material to be excavated, thus filling it. Q is for hoisting it and putting it into dumping position after it has been filled, and cable S is for the purpose of pulling back on dipperhandle K above its pivotal point N in the boom, thus forcing the dipper into the bank. The cables U V W perform precisely similar functions for the dipper J.

The filling-cables P U pass over pulleys X, revolving in a trolley-carrier Y, to which cables are secured, passing over fixed pulleys Z on the ends of the booms and then backward and downward to some fixed point within convenient reach of the operator, where they are passed over fixed pulleys Z, which are provided with pawls and ratchets and handles for ranging out the trolleys as the work of excavating proceeds.

The hoisting device is provided with six drums, which are operated by appropriate gearing from apair of engine-cylinders. Each dipper is controlled by three drums, one for filling, one for bringing the dipper into dumping position, and one for pressing the dipper into the materialduringexcavation. Thesedrums are each provided with a screw or other clutch device, foot or hand operated, for throwing them into frictional connection with the power mechanism for revolving them, and each drum is provided with a band-brake, which may be operated by hand or foot. In practice these clutch devices and friction-brakes for each dipper are all connected by appropriate simple angle-levers, lock-shafts, &c. so that all will lead to one stand, where a single operator can control them all without leaving his position but in the drawings I have shown the various clutches, &c., attached and operated at each drum for the sake of simplicity of illustration.

Referring to Fig. 2, which shows the machinery in plan, 1 is the boiler, 2 2 is a pair of en gine-cylinders, and 8 3 the piston-rods operated from said cylinders and connecting with a driving-shaft and gearing, which may be varied to suit the designer, for operating a gear 4. Gear 4: sets into motion the gears 5, 6, and 7. The gears at 5 6 are located on the shafts of well-known friction-hoists, and the friction-drums 8 9 10 11 12 13 are located on said shafts to revolve loosely thereon until thrown into frictional engagement therewith by the screw-clutches or other appropriate devices. Thus drum 8 has its screw or other clutch handle 14, drum 9 the handle 15, drum 10 its handle 16, drum 11 its handle 17, and drum 12 its handle or foot-operated clutch mechanism 18, and drum 13 its handle or footoperated clutch mechanism 10. Each of the six drums is provided with a band-brake of well-known character controlled byhan d orby foot, as desired, and passing around the brakepulleys 20.

The gear-wheel 7 is located on a shaft 21, revolving in fixed bearings On shaft 21 is located a sprocket-wheel 23, over which passes the sprocket-chain 21. Sprocket-chain 24 meshes with a sprocket-wheel 25, located on a shaft 26, which revolves in bearings 27. On shaft 26 is secured another sprocket-wheel 28, which meshes with the sprocket-chain 20, which then passes over a sprocket-wheel 30 on a shaft 31, revolving in beams 32. The shaft 31 has fixed to it a bevcl-gear 33, which meshes with bevel-gear 34., which drives on an endless carrier-belt roll 35.

36 represents the endless belt passing over roll 35, and this belt is located under the dippers when they are ready to dump and conveys the material continuously to the cars on the side-track. Between the shafts 21 and 26 and parallel thereto are located two shafts 3738 in suitable bearings 39 4-0, respectively.

On shaft 38 is keyed a gear-wheel 41, which receives its motion from a gear-wheel 42,keyed on shaft 26. On shafts 21 and 3S, respectively, are secured friction-pulleys 43 and t1, preferably of equal size. On shaft 37 is secured a larger friction-pulley 45, which is normally out of contact with both friction-pulleys 43 44, but which may be thrown into contact with either 43 or H, as desired, by means of an eccentric and lever mechanism well known to mechanics. On shaft 37 there is also located a sprocket-wheel 48, over which passes a sprocket-chain etf). The sprocketchain 49 passes over a sprocket-wheel 50, located on one of the axles of the wheels supporting the 1nachine-platform, and which is shown in Fig. 1.

By throwing the eccentric-lever 17 to the right or left the friction-wheel is caused to engage either the friction-roll 4-4: 01'4-3 and the shovel-ear is caused to advance or go backward along its track. After the dippers are filled the engines may be reversed to revolve the drums in a reverse direction, or I may allow the engines to run continuously and introduce a train-roll for reversing the movement, if desired, as is well known in engines which operate mechanism to be run in opposite directions at will without stoppage of the engine. These are mechanical details that concern the designer and do not involve the main spirit of my invention.

The cable connections described above are made over appropriate guiding-pulleys which are either swiveled or stationary, as found to give the best lead to the drums, and then each passes to its appropriate drum. The three drums on each side of the center line of the machinery (shown in Fig. 2) are for the two sets of dippers, respectively, to perform the work of guiding the dipper-in scooping, pressin g into the material, and for elevating into a dumping position. Cable I passes over suitable guide-pulleys and then winds over drum 10. Q winds over drum 8, and \V winds over drum 12. In the same way the cables for dipper J are suitably led in pulleys, so that cable U winds over drum 11, cable V over drum 9, and cable S over drum 13. The dippers are either operated simultaneously or alternately, as desired, and dump on the continuous-belt carrier 36 to the cars (J.

51 is an apron to guide the excavated material upon the carrier, and 52 is a guy-rope by means of which the carrier 36 can be raised and lowered.

The operation of the device is as follows: The engines being started, lever 47 is thrown to the right or left, so as to throw friction-roll 45 into engagement with either roll 4-4 or 43, and the machine-car is propelled into position where the shovels are to work. The guidetrolley Y is then ranged out to its proper position on its boom II and secured. For shovel I the drums 10 and S are caused to be thrown into motion by means of friction-clutches 16 11, respectively, thus winding up cables I and Q, thus lifting the dipper-handle K. At the same time drum 12 is set in motion byits friction-clutch 18 and a pull is exerted on the end of dipper-handle at R to turn about its pivot-point M, thus pressing the dipper I into the embankment. After the dipper has reached the end of its cut and is full the cover, which consists of the arms a;, hinged to the sides of the shovel at a point as, having the wall m at right angles to said arms adapted to close the mouth or Opening of the bucket, is lowered by an attendant and the dipper is ranged inward until it is over the carrier 36, in the position shown for dipper J in Fig. 1, when the attendant opens its cover and allows the material to drop upon the carrier, which conveys it to the cars.

The operation of dipper J is precisely similar to that of dipper I and need not be explained. It is operated by its own set of drums, &c., and an attendant.

When one car has been filled, the shovelcar is moved by its self-propelling mechanism to the next car of the train.

Having fully explained the nature of my invention, what I desire to claim by Letters Patent is 1. In an excavating-machine, the combination of an excavating-dipper pivoted between its ends upon a handle, a fixed overhead boom secured to the framework of a traveling platform, said boom being provided with an opening through which the handle passes, acable secured to the front end of the dipper and passing over a trolley-pulley on said boom and then to a winding-drum, a second cable attached to the rear of the dipper and passing by suitable pulleys to a second winding-drum, a third cable secured to the handle above the boom and leading to a third winding-drum, with power mechanism for operating and controlling the movement of the said drums in either direction, substantially as described.

2. In an excavating-machine, the combination of a dipper for excavating, a handle pivoted thereto and extending through a fixed overhead boom supported by framework upon a platform, cables for raising, lowering, and forcing forward said dipper, winding-drums and power mechanism located on said platform for operating said cables,with a continuously-moving adjustable carrier located on said platform, beneath the dipper when in its dumping position, for the purpose of conveying the excavated material to its point of delivery, substantially as described.

3. In an excavating-machine, the combination of a platform adapted to be propelled over rails by power mechanism upon the platform, an elevated fixed boom extending across said platform and provided with an opening, a handle passing through said opening, a dipper pivoted to the lower end of said handle, a cable secured to the front end of said dipper, leading to a pulley near the end of said boom, and thence to a winding-drum operated by said power mechanism, a second cable secured to the rear of said dipper and leading to a second winding-drum operated by the power mechanism, with a third cable attached to the handle above the boom and leading to a third winding-drum operated by said power mechanism, whereby the dipper is lowered, raised, forced into the material to be excavated and brought rearward and lowered into a dumping position by said cable, substantially as described.

4. In an excavating-machine, the combination of a platform adapted to be propelled over a track by power mechanism on said platform, an elevated fixed boom extending across said platform, a dipper-handle adapted to pass through and swing on said boom, a dipper pivotally secured to the lower end of said handle, means for raising, lowering, and forcing forward said dipper into the material to be excavated, an endlesscarrier upon which the material is to be dumped, a car located upon a track, parallel to the first-named track, into which the carrier is to convey said material, with power mechanism for moving the platform upon its track and for operating the dipper mechanism, substantially as described.

5. In an eXcaVatingmachine, the combination of a self-propelling platform adapted to run upon tracks, two parallel, fixed, overhead booms extending across said platform, ahandle passing through an opening in each of said booms, a dipper pivotally secured on the end of each handle, independent means for lowering, pressing forward and raising each of said dippers, a traveling carrier upon which the dippers dump the excavated material, with a car, or cars, located on tracks parallel to the first-named tracks into which the material is conveyed by said carrier, substantially as set forth.

6. In an excavating-machine, the combination of two fixed, parallel, overhead booms located upon a traveling car, a dipper-handle arranged to raise and lower and to swing from each of said booms, a dipper pivoted to the lower end of each of said handles, a cable attached to the forward end of each dipper and passing over a suitable pulley on each of said booms, a second cable attached to the rear of each of said dippers, a third cable secured to each of said handles above the respective booms, winding-drums for raising and lowering said cables, with power mechanism located 011 said car for operating said drums, substantially as described.

7. In an excavating-machine, the combination of two, parallel, fixed, overhead booms extending across a platform, a dipper-handle passing through an opening in each of said booms and capable of swinging therein, a dipper attached to the lower end of each of said handles, a cable attached to the front of each of said dippers, a second cable attached to the rear of said dippers, and a third cable attached to each of said handles above the booms, power mechanism for operating said cables to raise, lower, and force the dippers into the material to be excavated, with an automatic carrier for conveying the material after it has been dumped, substantially as described.

8. In an excavating-machine, the combination of two fixed, parallel, overhead booms extending across a platform, openings in each of said booms, dipper handles extending through each of said openings, dippers pivoted IIO on the lower ends of said handles, a cable attached to the front end of each dipper and passing over a pulley on each of said booms, a cable attached to the rear of each dipper, a cable attached to each handle above the booms, independent power mechanism for winding said cables, with a traveling carrier to convey the excavated material from said dippers to its point of delivery, substantially as described.

9. The combination of a car located on a track, power mechanism for propelling the car along the track, two parallel, fixed, overhead booms extending across the car, a dipperhandle adapted to move through and swing in an opening on each of said booms, dippers on the ends of each of the handles, a

cable attached to the front of each dipper, a cable attached to the rear of each dipper, a cable attached to each of said handles above the booms, independent means, operated from said power mechanism, for winding said cables, an endless-belt carrier for conveying the excavated material from the filled dippers, with a car located on a track running parallel with the first-named track for receiving the said material, substantially as described.

I11 testimony that I claim the foregoing as my own I aflix my signature in presence of two witnesses.

MORTON E. PUGII.

Witnesses:

ABNER T. YOUNG, MAUDE SHoURDs. 

